norelgestromin and its Impurities

Norelgestromin is used for contraception and menopausal hormonal therapy transdermally or in combination with ethinyl estradiol as a vaginal ring. It is sold under the brand names Evra and Ortho Evra. It is available as a generic medication. Reference standards of Norelgestromin API,and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.